<!-- HEXAGONAL P622 SPACE GROUPS -->
<input type="checkbox" name="spacegroups[]" id="sg_P622" value="P622"> P622<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P6122" value="P6122"> P6122<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P6222" value="P6222"> P6222<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P6322" value="P6322"> P6322<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P6422" value="P6422"> P6422<br/>
<input type="checkbox" name="spacegroups[]" id="sg_P6522" value="P6522"> P6522<br/>
